Accessing the WAN

Assignment A

1.    Compare MPLS and IPSec-VPNs as WAN technologies? What are the advantages and disadvantages of each technology? 

    
2.    Is there a way to direct FC3 to use MS-CHAP V2 authentication across a PPP dialup connection? If so, how?

    
4.    What is the Frame Relay broadcast queue?

    
6.    What are the three types of VPNs? What type of VPNs link outside customers, suppliers, partners, or communities of interest to an enterprise customer's network over a shared infrastructure using dedicated connections?

Assignment B

Case Detail:  
                CASE STUDY

You need to troubleshoot a Cisco router at the Toronto office of How2Pass Inc. The router loses its configuration each time it is rebooted. You study the output displayed in the exhibit. What is the cause of the problem?
Exhibit:
----- output omitted ----
Cisco 2620 (MPC860) processor (revision 0x200) with
16384/2048K bytes of memory.
Processor board ID JAD05076EF6 (3878188963)
M860 processor: part number 0, mask 49
Bridging software.
X.25 software, Version 3.0.0.
2 Ethernet/IEEE 802.3 interface(s)
2 Serial(sync/async) network interface(s)
2 Low speed serial(sync/async) network interface(s)
32K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read/Write)
Configuration register is 0x2142

1.    Which is the most secure encryption algorithm: DES, 3DES, or Diffie-Hellman?

2.    How do cryptography-based keys ensure the validity of data transferred across the network?

3.    In a sub netted environment, how does the DHCP server discover what subnet a request has come from? If a physical LAN has more than one logical subnet, how can different groups of clients be allocated addresses on different subnets?

Assignment C

Question No.  1    Marks – 10 Solve by www.solvezone.in contact for more details at - 8882309876

The _______ is the physical path over which a message travels.    
 
Options    
Protocol    
Medium    
Signal    
All the above

Question No.  2    Marks - 10
The information to be communicated in a data communications system is the _______.    
 
Options    
Medium    
Protocol    
Message    
Transmission

Question No.  3    Marks - 10
Frequency of failure and network recovery time after a failure are measures of the _______ of a network.    
 
Options    
Performance    
Reliability    
Security    
Feasibility

Question No.  4    Marks - 10
An unauthorized user is a network _______ issue.    
 
Options    
Performance    
Reliability    
Security    
All the above    

Question No.  5    Marks - 10
Which topology requires a central controller or hub?    
 
Options    
Mesh    
Star    
Bus    
Ring

Question No.  6    Marks - 10
Which topology requires a multipoint connection?    
 
Options    
Mesh    
Star    
Bus    
Ring

Question No.  7    Marks - 10
Communication between a computer and a keyboard involves ______________ transmission.    
Options    
simplex    
half-duplex    
full-duplex    
automatic

Question No.  8    Marks - 10
A television broadcast is an example of _______ transmission.    
 
Options    
simplex    
half-duplex    
full-duplex    
automatic

Question No.  9    Marks - 10
A _______ connection provides a dedicated link between two devices.    
 
Options    
point-to-point    
multipoint    
primary    
secondary

Question No.  10    Marks - 10
In a _______ connection, more than two devices can share a single link.    
 
Options    
point-to-point    
multipoint    
primary    
secondary

Question No.  11    Marks - 10
In _______ transmission, the channel capacity is shared by both communicating devices at all times.    
 
Options    
simplex    
half-duplex    
full-duplex    
half-simplex
Question No.  12    Marks - 10
In the original ARPANET, _______ were directly connected together.    
 
Options    
IMPs    
host computers    
networks    
routers

Question No.  13    Marks - 10
This was the first network.    
 
Options    
CSNET    
NSFNET    
ANSNET    
ARPANET

Question No.  14    Marks - 10
Which organization has authority over interstate and international commerce in the communications field?    
 
Options    
ITU-T    
IEEE    
FCC    
ISOC

Question No.  15    Marks - 10
_______ are special-interest groups that quickly test, evaluate, and standardize new technologies.    
 
Options    
Forums    
Regulatory agencies    
Standards organizations    
All of the above

Question No.  16    Marks - 10
Which agency developed standards for physical connection interfaces and electronic signaling specifications?    
 
Options    
EIA    
ITU-T    
ANSI    
ISO

Question No.  17    Marks - 10
_______ is the protocol suite for the current Internet.    
 
Options    
TCP/IP    
NCP    
UNIX    
ACM

Question No.  18    Marks - 10
_______ refers to the structure or format of the data, meaning the order in which they are presented.    
 
Options    
Semantics    
Syntax    
Timing    
All of the above

Question No.  19    Marks - 10
________ defines how a particular pattern to be interpreted, and what action is to be taken based on that interpretation.    
 
Options    
Semantics    
Syntax    
Timing    
None of the above

Question No.  20    Marks - 10
_______ refers to two characteristics: when data should be sent and how fast it can be sent.    
Options    
Semantics    
Syntax    
Timing    
none of the above    

Question No.  21    Marks - 10
Data flow between two devices can occur in a _______ way.    
 
Options    
simplex    
half-duplex    
full-duplex    
all of the above

Question No.  22    Marks - 10
In a ______ connection, two and only two devices are connected by a dedicated link.    
 
Options    
multipoint    
point-to-point    
(a) and (b)    
none of the above

Question No.  23    Marks - 10
In a ________ connection, three or more devices share a link.    
 
Options    
multipoint    
point-to-point    
(a) and (b)    
none of the above    

Question No.  24    Marks - 10
______ refers to the physical or logical arrangement of a network.    
 
Options    
Data flow    
Mode of operation    
Topology    
None of the above

Question No.  25    Marks - 10
Devices may be arranged in a _____ topology.    
 
Options    
mesh    
Bus    
Ring    
all of the above

Question No.  26    Marks - 10
A _______ is a data communication system within a building, plant, or campus, or between nearby buildings.    
 
Options    
MAN    
LAN    
WAN    
none of the above

Question No.  27    Marks - 10
A ______ is a data communication system spanning states, countries, or the whole world.    
 
Options    
MAN    
LAN    
WAN    
none of the above

Question No.  28    Marks - 10
________ is a collection of many separate networks.    
 
Options    
A WAN    
An internet    
a LAN    
None of the above

Question No.  29    Marks - 10
There are ______________ Internet service providers.    
 
Options    
local    
regional    
national and international    
all of the above

Question No.  30    Marks - 10
A ________ is a set of rules that governs data communication.    
 
Options    
forum    
protocol    
standard    
none of the above    

Question No.  31    Marks - 10
________ is an idea or concept that is a precursor to an Internet standard.    
 
Options    
RCF    
RFC    
ID    
none of the above

Question No.  32    Marks - 10
Which networking device is typically used to concentrate the dial-in and dial-out traffic of multiple users to and from a network?    
 
Options    
core router    
access server    
Frame Relay switch    
ATM switch    

Question No.  33    Marks - 10
Which packet-switched WAN technology offers high-bandwidth connectivity capable of managing data, voice, and video all on the same infrastructure?    
 
Options    
Time Division Multiplexing (TDM)    
metro Ethernet    
Integrated Services Digital Network (ISDN)    
Public Switched Telephone Network (PSTN)    

Question No.  34    Marks - 10
What can cause a reduction in available bandwidth on a cable broadband connection?    
 
Options    
smaller cells    
number of subscribers    
committed information rate    
distance from the central office of the provider    

Question No.  35    Marks - 10
What type of connectivity is established when VPNs are used from the remote site to the private network?    
 
Options    
PVCs    
DLCIs    
tunnels    
dedicated Layer 2 links

Question No.  36    Marks - 10
For digital lines, which device is used to establish the communications link between the customer equipment and the local loop?    
 
Options    
CSU/DSU    
Frame Relay switch    
ISDN switch    
modem

Question No.  37    Marks - 10
Which term describes a device that will put data on the local loop?    
 
Options    
DTE    
DCE    
BRI    
PRI

Question No.  38    Marks - 10
Which switching type will allow the communication devices in the provider network to be shared and only allocated to an individual subscriber during data transfer?    
 
Options    
circuit-switched    
dedicated switched lines    
frame-switched    
packet-switched

Question No.  39    Marks - 10
A company needs a WAN connection that is capable of transferring voice, video, and data at a minimum data rate of 155 Mbps. Which WAN connection is the best choice?    
 
Options    
X.25    
ATM    
ISDN BRI    
DSL

Question No.  40    Marks - 10
Which PPP configuration option can be used to establish load balancing over the interfaces of a router?    
 
Options    
callback    
multilink    
compression    
error detection